A composite bismuth vanadate photoelectrode comprising a bionic manganese-core cubane catalyst and a preparing method thereof

A technology of bismuth vanadate and cubane, which is applied in the field of biomimetic manganese nuclear cubane catalyst composite bismuth vanadate photoelectrode and its preparation, can solve the problems of high reaction overpotential and slow reaction kinetics, and achieve broad application prospects, current High density, the effect of improving photoelectric conversion efficiency

Inactive Publication Date: 2019-09-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the water oxidation reaction in photocatalytic water splitting involves a four-electron process, a high reaction overpotential is required and the reaction kinetics are slow.

Method used

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  • A composite bismuth vanadate photoelectrode comprising a bionic manganese-core cubane catalyst and a preparing method thereof
  • A composite bismuth vanadate photoelectrode comprising a bionic manganese-core cubane catalyst and a preparing method thereof
  • A composite bismuth vanadate photoelectrode comprising a bionic manganese-core cubane catalyst and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Preparation of bismuth vanadate seed layer: Weigh 0.41 g of bismuth nitrate and 0.365 g of ethylenediaminetetraacetic acid and disperse in 15 ml of deionized water, add 1 ml of ammonia water to adjust the pH, stir until the powder dissolves, and prepare A solution. Weigh 0.1 g of ammonium metavanadate and 0.0913 g of ethylenediaminetetraacetic acid and disperse them in 15 ml of deionized water, add 1 ml of ammonia water to adjust the pH, stir until the powder dissolves, and prepare solution B. The solution A and the solution B are evenly mixed to obtain a seed layer precursor. Take the FTO conductive glass for spin coating, 10 drops each time, spin coating 3 times, and keep warm at 500 °C for 10 min after each spin coating. After the spin coating was completed, the FTO conductive glass was placed in the air atmosphere and calcined at 500 °C for 2 h to obtain a bismuth vanadate seed layer.

[0033] (2) Preparation of bismuth vanadate photoelectrode: Weigh 0.1455 g o...

Embodiment 2

[0041](1) Preparation of bismuth vanadate seed layer: Weigh 0.41 g of bismuth nitrate and 0.365 g of ethylenediaminetetraacetic acid and disperse in 15 ml of deionized water, add 1 ml of ammonia water to adjust the pH, stir until the powder dissolves, and prepare A solution. Weigh 0.1 g of ammonium metavanadate and 0.0913 g of ethylenediaminetetraacetic acid and disperse them in 15 ml of deionized water, add 1 ml of ammonia water to adjust the pH, stir until the powder dissolves, and prepare solution B. The solution A and the solution B are evenly mixed to obtain a seed layer precursor. Take the FTO conductive glass for spin coating, 10 drops each time, spin coating 3 times, and keep warm at 500 °C for 10 min after each spin coating. After the spin coating was completed, the FTO conductive glass was placed in the air atmosphere and calcined at 500 °C for 2 h to obtain a bismuth vanadate seed layer.

[0042] (2) Preparation of bismuth vanadate photoelectrode: Weigh 0.1455 g of...

Embodiment 3

[0050] (1) Preparation of bismuth vanadate seed layer: Weigh 0.41 g of bismuth nitrate and 0.365 g of ethylenediaminetetraacetic acid and disperse in 15 ml of deionized water, add 1 ml of ammonia water to adjust the pH, stir until the powder dissolves, and prepare A solution. Weigh 0.1 g of ammonium metavanadate and 0.0913 g of ethylenediaminetetraacetic acid and disperse them in 15 ml of deionized water, add 1 ml of ammonia water to adjust the pH, stir until the powder dissolves, and prepare solution B. The solution A and the solution B are evenly mixed to obtain a seed layer precursor. Take the FTO conductive glass for spin coating, 10 drops each time, spin coating 3 times, and keep warm at 500 °C for 10 min after each spin coating. After the spin coating was completed, the FTO conductive glass was placed in the air atmosphere and calcined at 500 °C for 2 h to obtain a bismuth vanadate seed layer.

[0051] (2) Preparation of bismuth vanadate photoelectrode: Weigh 0.1455 g o...

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Abstract

A composite bismuth vanadate photoelectrode comprising a bionic manganese-core cubane catalyst and a preparing method thereof are disclosed. The composite photoelectrode includes bismuth vanadate nanosheets and the bionic manganese-core cubane catalyst Mn4O4 loaded on the nanosheets. The method includes firstly preparing a bismuth vanadate photoelectrode, then preparing bionic manganese-core cubane powder, dissolving the powder into a dichloromethane solution, and then coating the bismuth vanadate photo-anode with the solution in a droplet coating manner to prepare the composite bismuth vanadate photoelectrode. The catalyst is loaded on the bismuth vanadate photo-anode so that surface water oxidation kinetics can be effectively accelerated, thus effectively improving the photoelectric converting efficiency. The composite bismuth vanadate photoelectrode has a wide application prospect in photocatalytic water decomposition, artificial photosynthesis and other fields. The preparing methodis simple, low in cost and high in operability.

Description

technical field [0001] The invention belongs to the field of composite thin films, and in particular relates to a bionic manganese nuclear cubane catalyst composite bismuth vanadate photoelectrode and a preparation method thereof. Background technique [0002] With the continuous development of human society, the demand for energy is also increasing day by day. Energy crisis and environmental pollution have become the biggest challenges facing mankind. As an inexhaustible clean energy, solar energy provides the necessary energy for life activities on the earth. Therefore, how to convert solar energy into other energy sources that can be used by humans has attracted extensive attention of researchers. In the current research, the use of metal oxide semiconductors for photocatalytic water splitting to generate hydrogen and oxygen can convert solar energy into stable chemical energy for human use, which is considered to have a good application prospect in the field of solar en...

Claims

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Application Information

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IPC IPC(8): C25B11/04C25B11/06C25B1/04
CPCC25B1/04C25B1/55C25B11/051C25B11/057C25B11/077Y02E60/36
Inventor 王涛高斌范晓莉李斌严娟娟姜澄郭虎李洋何建平黄现礼
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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